Hello, I was wondering is it possible to have on a dedicated web server configured for shared hosting. Multiple domains will be hosted and Postfix is to be used as MTA. Let's say we have mail.example.com and mail.example2.com and mail.example3.com. I have mail users for each domain.tld Incoming e-mail is delivered to each recipient with no problems. However, related to outgoing email now : when email@example.com tries to send an e-mail through it's mail client the e-mail gets sent but in the headers of the message appears mail.example.com not mail.example2.com Where is the error? Thanks.